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MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY
Lu, J. G.1,2; Du, Y. J.3; Hao LF(郝龙飞)4; Yan, Z.5; Liu, Z. Y.6; Lee, K. J.7; Qiao, G. J.2; Shang, L. H.8,9; Wang, M.4; Xu, R. X.1,2,7; Yue, Y. L.; Zhi, Q. J.8,9
Source PublicationASTROPHYSICAL JOURNAL
2016-01-10
Volume916Pages:2
DOI10.3847/0004-637X/816/2/76
Contribution Rank第4完成单位
Indexed BySCI
KeywordAcceleration Of Particles Pulsars: General Pulsars: Individual (Psr b1133+16) Radiation Mechanisms: Non-thermal
Abstract

The pulse profile of PSR B1133+16 is usually regarded as a conal double structure. However, its multi-frequency profiles cannot simply be fitted with two Gaussian functions, and a third component is always needed to fit the bridge region (between two peaks). This would introduce additional, redundant parameters. In this paper, through a comparison of five fitting functions (Gaussian, von Mises, hyperbolic secant, square hyperbolic secant, and Lorentz), it is found that the square hyperbolic secant function can best reproduce the profile, yielding an improved fit. Moreover, a symmetric 2D radiation beam function, instead of a simple 1D Gaussian function, is used to fit the profile. Each profile with either well-resolved or not-so-well-resolved peaks could be fitted adequately using this beam function, and the bridge emission between the two peaks does not need to be a new component. Adopting inclination and impact angles based on polarization measurements, the opening angle (theta(mu)0) of the radiation beam in a certain frequency band is derived from beam-function fitting. The corresponding radiation altitudes are then calculated. Based on multi-frequency profiles, we also computed the Lorentz factors of the particles and their dispersion at those locations in both the curvature-radiation and inverse-Compton-scattering models. We found that the Lorentz factors of the particles decrease rapidly as the radiation altitude increases. Besides, the radiation prefers to be generated in an annular region rather than the core region, and this needs further validation.

Funding ProjectNational Basic Research Program of China (973 program)[2012CB821800] ; talent team of science and technology innovation in Guizhou Province[(2015) 4015] ; National Natural Science Foundation of China[11373011] ; National Natural Science Foundation of China[11303069] ; National Natural Science Foundation of China[11225314] ; National Natural Science Foundation of China[11103021] ; National Natural Science Foundation of China[11565010] ; National Natural Science Foundation of China[11165006]
Funding OrganizationNational Basic Research Program of China (973 program)[2012CB821800] ; talent team of science and technology innovation in Guizhou Province[(2015) 4015] ; National Natural Science Foundation of China[11373011, 11303069, 11225314, 11103021, 11565010, 11165006]
Language英语
Subject Area天文学 ; 射电天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
WOS IDWOS:000368238500028
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordINVERSE COMPTON-SCATTERING ; GAMMA-RAY EMISSION ; PULSAR EMISSION ; FREQUENCY-DEPENDENCE ; ANNULAR GAP ; EMPIRICAL-THEORY ; CRAB PULSAR ; ICS MODEL ; BEAMS ; CORE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9399
Collection射电天文研究组
Corresponding AuthorLu, J. G.
Affiliation1.State Key Laboratory of Nuclear Science and Technology, Peking University, Beijing 100871, China
2.School of Physics, Peking University, Beijing 100871, China
3.Qian Xuesen Laboratory of Space Technology, Beijing 100094, China
4.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
5.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
6.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China
7.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
8.School of Physics and Electronic Science, Guizhou Normal University, and NAOC-GZNU Center for Astronomy Research and Education, Guiyang, Guizhou 550001, China
9.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Recommended Citation
GB/T 7714
Lu, J. G.,Du, Y. J.,Hao LF,et al. MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY[J]. ASTROPHYSICAL JOURNAL,2016,916:2.
APA Lu, J. G..,Du, Y. J..,Hao LF.,Yan, Z..,Liu, Z. Y..,...&Zhi, Q. J..(2016).MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY.ASTROPHYSICAL JOURNAL,916,2.
MLA Lu, J. G.,et al."MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY".ASTROPHYSICAL JOURNAL 916(2016):2.
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